How do we know the doctrine of suffering for Christ is true?

Suffering for Christ is rooted in the New Testament, particularly in Philippians 1:29, where Paul states that it has been granted to believers not only to believe in Christ but also to suffer for His sake. This truth is evident in Paul's life, as he faced persecution and ultimately martyrdom for preaching the gospel. The consistent theme throughout Scripture is that suffering is part of the Christian calling, as it refines one’s faith and identifies believers with Christ’s own sufferings. Those who understand their identity in Christ recognize that their trials serve a greater purpose in God’s sovereign plan.